This feature has nothing to do with IE. It's called something like "system file protection" (can't recall exact term). Nearly everything in System32 is protect

This feature has nothing to do with IE. It's called something like "system file protection" (can't recall exact term). Nearly everything in System32 is protected by this: Windows keeps shadow copies of those files: their attempt at fixing "default administrator" legacy - how else can OS protect itself if installed on FAT32?